13773856 has 12 divisors (see below), whose sum is σ = 27117342. Its totient is φ = 6886912.

The previous prime is 13773847. The next prime is 13773899. The reversal of 13773856 is 65837731.

It can be written as a sum of positive squares in only one way, i.e., 8410000 + 5363856 = 2900^2 + 2316^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215185 + ... + 215248.

Almost surely, 2^13773856 is an apocalyptic number.

13773856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13773856 is a deficient number, since it is larger than the sum of its proper divisors (13343486).

13773856 is an equidigital number, since it uses as much as digits as its factorization.

13773856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430443 (or 430435 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The square root of 13773856 is about 3711.3145918933. The cubic root of 13773856 is about 239.7094632417.

The spelling of 13773856 in words is "thirteen million, seven hundred seventy-three thousand, eight hundred fifty-six".